Question

Ecological pyramids are a good model to use to show the relationships between trophic levels in an ecosystem because:

A: they are exact

B: it shows that the lower levels are needed to support the higher levels

C: it shows that the higher levels do not need any support from the lower levels

D: it shows that the higher levels are bigger than the lower level

Answer 1

Answer: B: it shows that the lower levels are needed to support the higher levels.

Explanation: When an ecosystem is healthy, this graph produces a standard ecological pyramid. This is because in order for the ecosystem to sustain itself, there must be more energy at lower trophic levels than there is at higher trophic levels.